Paraptenodytes robustus is a species of the extinct penguin genus Paraptenodytes, which is known from fossils. It was medium-sized, an estimated long in life (similar to a Magellanic penguin). The fossils of this species are known from several dozen bones, found in Early Miocene rocks of the Gaimán Formation. Documented locations are near La Cueva, Trelew in Chubut Province, and Puerto San Julián in Santa Cruz Province, Argentina. Most remains are only tentatively assigned to this species, however, and the tarsometatarsus formerly referred to as Treleudytes crassus may belong to a completely different species. On the other hand, Paraptenodytes brodkorbi is probably synonymous with P. robustus. References Further reading Ameghino, Florentino (1895): Sur les oiseaux fossiles de Patagonie. Bol. Inst. Geogr. Argentina 15 501–602. [Article in French] Simpson, George Gaylord (1946): Fossil penguins. Bull. Am. Mus. Nat. Hist. 87: 7-99. PDF fulltext Simpson, George Gaylord (1971): Conspectus of Patagonian fossil penguins. American Museum Novitates 2488: 1-37. PDF fulltext Paraptenodytes Extinct penguins Miocene birds of South America Colhuehuapian Santacrucian Neogene Argentina Fossils of Argentina Gaiman Formation Fossil taxa described in 1894 Taxa named by Florentino Ameghino